NEW YORK - Internet phone company Vonage Holdings said Wednesday it filed a motion seeking a review of a U.S. court's verdict on a patent litigation case with Verizon Communications.

On Sept. 26, a U.S. appeals court upheld a verdict that Vonage infringed two patents held by Verizon, although it reversed a lower court's interpretation on the third patent and ordered more proceedings to recalculate damages and royalties.

Vonage has been hit with a series of legal setbacks since its initial public offering in May 2006.

It recently settled a patent lawsuit filed by Sprint Nextel Corp, and Vonage said it would "explore all legal options available to put the Verizon litigation to rest."

Worries over growing competition from cable television providers and other Internet companies in addition to concerns over its legal woes have dragged Vonage shares down 89 percent from the $17 IPO price.

The stock fell 11.9 percent to $1.93 Wednesday on the New York Stock Exchange. (Reporting by Ritsuko Ando)

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